whoa this is hard, well...
- Eeveelutions: Steel --and-- Poison
-Pseudo Legendary: Ghost/Fire
-Main Legendaries: Xerneas= Psychic/Steel --and-- Yveltal= Dark/Flying
-Starters secondary type (last evolution) : Grass/Dark -- Fire(pure) -- Water(pure)
-Cross Generation: there won't be any, i proposse that if this happens we (who say there won't be any) get 3pts 1 for each option the others could chose - just a sugestion.
and that's it!! :D